An objective image quality evaluation process was established to ensure good printing quality. The traditional evaluation methods were expanded which considered substrate factors. The subjective evaluation was objectified, and the project indicators of objective evaluation were refined. The comprehensive evaluation was eventually conducted. The grading standards of parameters for each evaluation method were determined according to national standards and standards from research statistics, and score was set to evaluate the performance of image quality by quantitative results. The evaluation process was applied on some different types of digital color image, and comprehensive scores show that the standard image is the print of grade A.